@inbook{1155973448, author={David D. Spragg and Gordon F. Tomaselli}, editor={Jameson, J. Larry and Fauci, Anthony S. and Kasper, Dennis L. and Hauser, Stephen L. and Longo, Dan L. and Loscalzo, Joseph}, title={The Bradyarrhythmias: Disorders of the Sinoatrial Node}, booktitle={Harrison's Principles of Internal Medicine, 20e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2018}, url={accessmedicine.mhmedical.com/content.aspx?aid=1155973448} }